How accurate is Height Data and LiDAR?

The vertical accuracies vary depending on the dataset and how the data has been created.

The accuracy for each dataset available is listed below.

Height Data

• Getmapping Height Data has a vertical accuracy of 50-60cm +/- RMSE and a horizontal accuracy of <1m +/- RMSE
• NEXTMap Height Data has a vertical accuracy of around 1m +/- RMSE and a horizontal accuracy of 2.5m +/- RMSE

LiDAR

• Environment Agency LiDAR data has a vertical accuracy of 5-15cm +/- RMSE and a horizontal accuracy of 40cm +/- RMSE
• Atkins Global LiDAR 15-25cm +/- RMSE 
• The Geoinformation Group LiDAR has a vertical accuracy of 15cm +/- RMSE and a horizontal accuracy of 1.5m +/- RMSE
• Bluesky LiDAR has a vertical accuracy of  up to 10cm +/- RMSE and a horizontal accuracy of up to 5cm +/- RMSE